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enCRPlate Tectonics20
Asthenosphere:the soft, flexible upper layer of the mantle, on which the tectonic plates move
Convergent:the type of boundary where plates move toward each other and converge or collide
Divergent:the type of boundary where plates pull apart
Transform:the type of boundary where plates slide along one another
Lithosphere:a rigid layer that is 100km thick and generally less dense then the material underneath
Continental Drift:the theory that all Earth's continents were once joined together into a single large landmass, and then moved apart, forming the continents we see today
Mid Ocean Ridge:a system of connected underwater mountain ranges
Pangaea:"all land" the single huge super continent that supposedly existed 245 million years ago, when all of Earth's continents were joined together
Seafloor Spreading:the process by which new oceanic crust forms when magma rises and solidifies the mid-ocean ridges. The newer crust pushes the old crust out to each side, which is why the age of the seafloor increases with distance away from the mid-ocean ridges
Seismograph:a device used by scientist to record surface waves from earthquakes
Earthquake:vibrations caused by braking rocks around faults
Volcano:an opening in Earth's surface that often forms a mountain when layers of volcanic ash erupt and build up
Fault:a crack in the earth's crust resulting from the displacement of one side with respect to the other
Hot Spot:location on the mantle that is hotter than any other areas and that melt rock, which is forced upward toward the crust as magma
Mantle:the largest layer inside Earth, lying directly above the outer core and that is made mostly of silicon, oxygen, magnesium, and iron
Seismic Waves:energy waves that are produced at and travel outward from the earthquake's focus
Convection Current:the cycle of rising, heating, cooling, and sinking that is thought to be the force behind plate tectonics
Plate:a rigid layer of the Earth's crust that is believed to drift slowly
Plate Tectonics:the theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle
Harry Hess:the geologist known for his theories on seafloor spreading

Plate Tectonics

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Across:

2.

the theory that all Earth's continents were once joined together into a single large landmass, and then moved apart, forming the continents we see today

4.

the soft, flexible upper layer of the mantle, on which the tectonic plates move

7.

"all land" the single huge super continent that supposedly existed 245 million years ago, when all of Earth's continents were joined together

10.

the geologist known for his theories on seafloor spreading

11.

the type of boundary where plates slide along one another

12.

the type of boundary where plates pull apart

14.

the cycle of rising, heating, cooling, and sinking that is thought to be the force behind plate tectonics

16.

the type of boundary where plates move toward each other and converge or collide

18.

a system of connected underwater mountain ranges

19.

location on the mantle that is hotter than any other areas and that melt rock, which is forced upward toward the crust as magma

Down:

1.

the process by which new oceanic crust forms when magma rises and solidifies the mid-ocean ridges. The newer crust pushes the old crust out to each side, which is why the age of the seafloor increases with distance away from the mid-ocean ridges

3.

a crack in the earth's crust resulting from the displacement of one side with respect to the other

5.

energy waves that are produced at and travel outward from the earthquake's focus

6.

vibrations caused by braking rocks around faults

7.

the theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle

8.

a rigid layer that is 100km thick and generally less dense then the material underneath

9.

a rigid layer of the Earth's crust that is believed to drift slowly

13.

a device used by scientist to record surface waves from earthquakes

15.

an opening in Earth's surface that often forms a mountain when layers of volcanic ash erupt and build up

17.

the largest layer inside Earth, lying directly above the outer core and that is made mostly of silicon, oxygen, magnesium, and iron

the theory that all Earth's continents were once joined together into a single large landmass, and then moved apart, forming the continents we see today

4.

the soft, flexible upper layer of the mantle, on which the tectonic plates move

7.

"all land" the single huge super continent that supposedly existed 245 million years ago, when all of Earth's continents were joined together

10.

the geologist known for his theories on seafloor spreading

11.

the type of boundary where plates slide along one another

12.

the type of boundary where plates pull apart

14.

the cycle of rising, heating, cooling, and sinking that is thought to be the force behind plate tectonics

16.

the type of boundary where plates move toward each other and converge or collide

18.

a system of connected underwater mountain ranges

19.

location on the mantle that is hotter than any other areas and that melt rock, which is forced upward toward the crust as magma

Down:

1.

the process by which new oceanic crust forms when magma rises and solidifies the mid-ocean ridges. The newer crust pushes the old crust out to each side, which is why the age of the seafloor increases with distance away from the mid-ocean ridges

3.

a crack in the earth's crust resulting from the displacement of one side with respect to the other

5.

energy waves that are produced at and travel outward from the earthquake's focus

6.

vibrations caused by braking rocks around faults

7.

the theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle

8.

a rigid layer that is 100km thick and generally less dense then the material underneath

9.

a rigid layer of the Earth's crust that is believed to drift slowly

13.

a device used by scientist to record surface waves from earthquakes

15.

an opening in Earth's surface that often forms a mountain when layers of volcanic ash erupt and build up

17.

the largest layer inside Earth, lying directly above the outer core and that is made mostly of silicon, oxygen, magnesium, and iron